Geothermal Stimulation Roto-jet Baker Hughes

GEOTHERMAL PRODUCTION EHHANCEMENT

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© 2014 BAKE R HUGH ES INC ORPORA TED. ALL RIGHT S RES ERVED. TERM S AND CONDIT IONS O F USE : BY ACCEP TING T HIS DO CUMENT, THE RECIPIEN T AGRE ES T HAT TH E DOC UMENT TOGE TOGE THER W ITH A LL INF ORMATIO N INCLU DED THE THER REIN EIN IS THE CONF IDENTIAL AND PROPR IETARY PROPE RTY O F BAK ER HU GHES INCORPO RATED AND IN CLUDES VAL UABLE TRADE S ECRE TS AN D/OR P ROPRIET ARY IN FORMATIO N OF BAKE R HUGH ES ( COLLECTIV ELY "INFORMAT ION") . BAK ER HUG HES RETAINS ALL RIGHTS UNDE R COPYRI GHT LAW S AND TR ADE SEC RET LAW S OF THE U NITED S TATES OF AMERIC A AND OT HER COUN TRIES. THE R ECIPIENT FURTHER AGREES THAT TH E DOCUME NT MAY N OT BE DIS TRIBUTE D, TRANSM ITTED, CO PIE D OR R EPRODU CED IN WHO LE OR

GEOTHERMAL STIMULATION OBJECTIVES

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Wellbore Scale Removal

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Damage from Lost Drilling Fluid

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Formation Natural Fissures Cleanup

GEOTHERMAL STIMULATION OBJECTIVES Wellbore Scale:

Best to Combine Mechanical and Chemical Removal

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Mechanical Removal: BHI RotoJet

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Chemical Removal: BHI Sandstone Acid

BHI Roto-JetTM / Roto-PulseTM System Roto-JetTM High pressure jetting

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 –

Brittle scale removal

 –

360o full fluid coverage

 –

Stress Cycling

Stimulation  –

Open hole acid delivery

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Perforation

 –

Slotted liners

Roto-JetTM Substances Jetted

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 –

asphaltenes

 –

screens

 –

calcium carbonate

 –

Sand

 –

filter cake

 –

sulfur

 –

barium sulfate

 –

gypsum

ROTOJET

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ROTOJET

Before RotoJet

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Plugged Liner Section with base  pipe removed consisting of calcium carbonate scale and other solids, containing fines. 8

After RotoJet

Liner Section after cleaning with Roto-Jet + chemical treatment. The base pipe was removed after testing.

ROTOJET CLIPS

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ROTOJET CLIPS

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GEOTHERMAL STIMULATION OBJECTIVES Wellbore Scale:

Best to Combine Mechanical and Chemical Removal

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Mechanical Removal: BHI RotoJet

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Chemical Removal: BHI Sandstone Acid

Scale Analysis Example Nicaragua – Momotombo – Geothermal Field

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LABORATORY ANALYSIS

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THE SOLUTION TO ENHANCE PRODUCTION / INJECTION Pumping Small Volumes (10 to 20 gpf) of a Sandstone Acid System (typical volumes for shorter zones = +/- 50 to 200 gpf).

Volumes Designed to Penetrate the Very Near Wellbore Area only (inches). (typical penetration for shorter zones = +/- 3 to 5 feet).

Coil Tubing with Rotating jets to Help Ensure Good Zone Coverage Over Long Sections.

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RESULTS RIGLESS ACIDIZING WITH BHI SANDSTONE ACID Preflush Well

TR11A TR7 TR8A TR14

TR-11A TR-1B  .     d    e    v    r    e    s    e     R    s     t     h    g     i     R     l     l     A  .     d    e     t    a    r    o    p    r    o    c    n     I    s    e     h    g    u     H    r    e     k    a     B     4     1     0     2     ©

TR-11A TR-11A

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Main Treatment

Production Rate, MWe or Injection Rate, TM/hr

Postflush

Well Type

Injector  Injector  Injector  Injector 

Injector 

Injector  Injector  Injector 

Volume, (m3)

Type

Volume, (m3)

Type

Volume, (m3)

Type

Before

After

30

15% HCl

50

6% Sandstone Acid

160

3% HCl

0

90

40

15% HCl

90

7% Sandstone Acid

390

3% HCl

0

144

10

15% HCl

40

6% Sandstone Acid

100

3% HCl

14

65

60

10% HCl

100

8% Sandstone Acid

320

3% HCl

0

180

20

Scale/Rust Cleaner 

50

6% Sandstone Acid

210

3% HCl

14

90

70

10% HCl

90

6% Sandstone Acid

320

3% HCl

50

130

20

10% HCl

50

6% Sandstone Acid

110

3% HCl

0

90

20

10% HCl

50

6% Sandstone Acid

140

3% HCl

0

90

3.7

8.7

3.5

4.8

1.5

9.1

TR-17B

Producer 

80

15% HCl

100

10%:5% Sandstone Acid

360

3% HCl

TR-17A

Producer 

80

15% HCl

110

10%:5% Sandstone Acid

270

3% HCl

TR-18

Producer 

120

15% HCl

80

5% Sandstone Acid

320

3% HCl

RESULTS RIGLESS ACIDIZING WITH BHI SANDSTONE ACID Well

Preflush

Well Type

Volume, m3

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Main Treatment Type

Volume, m3

Type

Production Rate, MWe or Injection Rate, Tm/hr 

Postflush Volume, m3

Type

Before

After 

MT35

Producer 

64

10% HCl

184

5% Sandstone Acid

220

Fresh water 

0

3.6

MT42

Producer 

-

-

155

10% HCl

133

Fresh water 

0

1.4

RMT30

Injector 

64

10% HCl

184

5% Sandstone Acid

220

Fresh water 

90

150

RMT18

Injector 

93

10% HCl

99

5% Sandstone Acid

165

Fresh water 

150

250

MT27

Producer 

149

10% HCl

149

5% Sandstone Acid

540

Fresh water 

4.65

5.14

80

Fresh water 

6.48

9.48

133

Fresh water 

4.23

6.08

OM53

Producer 

84

10% HCl

84

5% Sandstone Acid

MT31

Producer 

95

15% HCl

74

10% HCl

GETHERMAL STIM. BHI INDONESIA •

10 years experience 18 of 42 Rotojet acidizing or cleanout jobs 2015 Campaign with PGE Q4 Campaign with Chevron •

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No.

Date

Client

Location

Well #

Type of Job

1

December-04

Unocal

Salak

AWI 1-1

Clean out with milling.

2

December-04

Unocal

Salak

AWI 9-1

Clean out with milling.

3

February-05

Unocal

Salak

AWI 8-7

Acidizing

4

September-05

Unocal

Salak

AWI 10-3

Acidizing

5

March-06

Chevron Geothermal Salak

Salak

AWI 8-8

Acidizing

6

April-06

Chevron Geothermal Salak

Salak

AWI 13-8

Acidizing

7

April-07

Chevron Geothermal Salak

Salak

AWI 1-9

Acidizing

8

April-07

Chevron Geothermal Salak

Salak

AWI 11-4

N2 kick off  

9

June-07

Chevron Geothermal Salak

Salak

AWI 11-6

Acidizing

10

September-08

Chevron Geothermal Salak

Salak

AWI 8-10

Acidizing

11

September-08

Chevron Geothermal Salak

Salak

AWI 11-5

Acidizing

12

September-08

Chevron Geothermal Salak

Salak

AWI 11-6

Acidizing

13

October-08

Chevron Geothermal Salak

Salak

AWI 19-2

Acidizing

14

October-08

Chevron Geothermal Salak

Salak

AWI 19-3

N2 kick off  

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December-09

Chevron Geothermal Indonesia

Darajat

DRJ-13

Rotojet Clean out/Milling

16

December-09

Chevron Geothermal Indonesia

Darajat

DRJ-25

Acidizing

17

January-10

Chevron Geothermal Indonesia

Darajat

DRJ-10

Acidizing

18

November-10

Chevron Geothermal Indonesia

Darajat

DRJ-13

Acidizing

19

November-10

Chevron Geothermal Indonesia

Darajat

DRJ-34

Acidizing

20

November-10

Chevron Geothermal Indonesia

Darajat

DRJ-36

Acidizing

21

November-10

Chevron Geothermal Salak

Salak

AWI 13-10

Acidizing

22

November-10

Chevron Geothermal Salak

Salak

AWI 18-1

Acidizing

23

December-11

Chevron Geothermal Salak

Salak

AWI 21-2

Acidizing

24

January-12

Star Energy Geothermal

Pangalengan

MBB-2

Acidizing and Rotojet

25

January-12

Star Energy Geothermal

Pangalengan

MBE-3

Acidizing and Rotojet

26

March-12

Star Energy Geothermal

Pangalengan

MBA-5

Acidizing and Rotojet

27

May-12

Chevron Geothermal Indonesia

Darajat

DRJ-3

P&A

28

May-12

Chevron Geothermal Indonesia

Darajat

DRJ-S5

P&A

29

July-12

Star Energy Geothermal

Pangalengan

MBA-3

Acidizing and Rotojet

30

July-12

Star Energy Geothermal

Pangalengan

MBA-4

Acidizing and Rotojet

31

July-12

Star Energy Geothermal

Pangalengan

MBB-6

Acidizing and Rotojet

32

January-13

Chevron Geothermal Indonesia

Darajat

DRJ-7

Rotojet Clean out

33

January-13

Chevron Geothermal Indonesia

Darajat

DRJ-8

Rotojet Clean out

34

January-13

Chevron Geothermal Indonesia

Darajat

DRJ-11

Rotojet Clean out

35

January-13

Chevron Geothermal Indonesia

Darajat

DRJ-17

Rotojet Clean out

36

January-13

Chevron Geothermal Indonesia

Darajat

DRJ-27

Rotojet Clean out

37

November-13

Chevron Geothermal Indonesia

Darajat

DRJ-18

Rotojet Clean out

38

December-13

Chevron Geothermal Indonesia

Darajat

DRJ-22

Rotojet Clean out

39

December-13

Chevron Geothermal Indonesia

Darajat

DRJ-37

Rotojet Clean out

40

August-14

Chevron Geothermal Indonesia

Darajat

DRJ-13

Rotojet Clean out

41

August-14

Chevron Geothermal Indonesia

Darajat

DRJ 20

Acidizing and Rotojet

42

September-14

Chevron Geothermal Indonesia

Darajat

DRJ-23

Rotojet Clean out

SUMMARY Wellbore Scale: Combination Mechanical and Chemical Removal

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BHI RotoJet: Full wellbore coverage for cleanout & acid placement BHI Sandstone Acid: Smaller volumes with same solubility as HCL fluid

Thank you Questions & Discussion

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